Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2b8750af787bf4…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 04:43:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3a061202579731688d43425881df703c SHA-1: 7e25cbf8f631a22bea42a54e3cbb79f83d3becbb SHA-256: 9a2b8750af787bf4aee313f07216ca94e8e62c31b2f34592a22b5ba296613b34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary lure appears to be a link to 'http://netcdn.tw/app/431946152/real-robux-game-hack', which is flagged as a malicious redirector. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/real-robux-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/get-free-catalog-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-the-free-dragon-wings-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-case-clicker-hack-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/lazyblox-com-free-robux-ad_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/hack-game-pass-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-printable-roblox-birthday-party-invites_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/2021-free-robux-daily-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-gamecards-redeem-2021-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3056 22748 bytes
SHA-256: ad4d63714bb56219422e5f225f6b5d75f457fe96d3323d3a95b964e32d303427
font_01_sfnt_off00006396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 18628 bytes
SHA-256: 29eba7206940d556af4f363c236118eb5b1c14453f83b7f820ad78e4d333ce52

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